000010101 001__ 10101 000010101 005__ 20240125143600.0 000010101 0247_ $$2DOI$$a10.6083/r494vk833 000010101 037__ $$aIR 000010101 245__ $$aAssessment of mid-treatment imaging on shifts during stereotactic body radiotherapy for prostate adenocarcinoma 000010101 260__ $$bOregon Health and Science University 000010101 269__ $$a2023 000010101 336__ $$aCapstone 000010101 502__ $$gMedicine (Undergraduate Medical Education) 000010101 502__ $$bM.D. 000010101 520__ $$aStereotactic body radiotherapy (SBRT) is delivered in much fewer fractions and higher doses than conventional EBRT, thus it is imperative that the treatment is both accurate and precise to ensure treatment of the prostate as well as minimization of radiation to surrounding organs at risk (OAR). Studies have shown that continuous monitoring of prostate position and intervention during treatment is important due to shifts outside of planned prostate position that necessitate corrective interventions. A potentially more cost-effective option than continuous monitoring would be to do an additional mid-treatment image to ensure prostate alignment and correct positioning. The objectives of this study were to 1) assess how time between pre-treatment and mid-treatment CT relates to application of shifts and magnitude of shifts and 2) assess how SpaceOar rectal gel (allows separation of rectal wall from prostate) could affect application and magnitude of shifts. 000010101 650__ $$aRadiotherapy$$025116 000010101 650__ $$aRadiosurgery$$029276 000010101 650__ $$aProstatic Neoplasms$$024731 000010101 6531_ $$astereotactic body radiotherapies 000010101 691__ $$aSchool of Medicine$$041369 000010101 7001_ $$aStratton, Amanda$$10000-0002-1318-9653$$uOregon Health and Science University$$041354 000010101 7201_ $$aKahn, Jenna$$uOregon Health and Science University$$041354$$7Personal$$eCo-mentor 000010101 7201_ $$aKishore, Monica$$uOregon Health and Science University$$041354$$7Personal$$eCo-mentor 000010101 7201_ $$aPaez, Wencesley$$uOregon Health and Science University$$041354$$7Personal$$eAdvisor 000010101 8564_ $$931f04ae0-0502-4407-b343-9e0927d94fc9$$s390324$$uhttps://digitalcollections.ohsu.edu/record/10101/files/Stratton.Amanda.2023.pdf 000010101 905__ $$a/rest/prod/r4/94/vk/83/r494vk833 000010101 909CO $$ooai:digitalcollections.ohsu.edu:10101$$pstudent-work 000010101 980__ $$aScholarly Project Capstones